(Computer-Assisted Instruction: Reducing Student Fatigue) One problem in CAI environments is student fatigue. This can be reduced by varying the computer’s responses to hold the student’s attention. Modify the program of Exercise 6.57 so that various comments are displayed for each answer as follows: Possible responses to a correct answer: Very good! Excellent! Nice work! Keep up the good work! Possible responses to an incorrect answer: No. Please try again. Wrong. Try once more. Don't give up! No. Keep trying. Use random-number generation to choose a number from 1 to 4 that will be used to select one of the four appropriate responses to each correct or incorrect answer. Use a switch statement to issue the responses. ------------------------------ EXERCISE 6.57 CODE: ----------------------------- //Name: IhabAtouf //Date:02/23/2023 // exercise 6.57 on page 281 //program description: create computer-assisted instruction (CAI) program that help students master thier math skills in multiplications, // multiplication involving two numbers each is a single digit positive, with encouraging message for succedding and another for failing to answer  // using random fucntion (rand) to generate a random number every time  #include// to be able to use input output stream #include//h is a header file in the standard library of the C programming language designed for basic mathematical operations #include//Converts a string into a long integer, also carry the library for definition of memory allocation and random processe #include//converts the given time since epoch to a calendar local time and then to a character representation. using namespace std;//using the standard library  int answer;//global varibale that can be used by any function in this code void questionGenerator() {//the function that generates the multiplication question      srand(time(NULL));// using the random function that changes every time per second      //here is the initial variable as zero by default      int initial = 0;     // here is two vraibales number1 and number2 that are required to multiply two numbers      int number1;     int number2;     number1 = (initial + (rand()) % 10);//the value of number1 using the follwing math : zero + any random number that has remainder of 10 using the remainder modulus     number2 = (initial + (rand()) % 10);//the value of number2 using the follwing math : zero + any random number that has remainder of 10 using the remainder modulus     answer = number1 * number2;// the asnwer variable that equals  the multiplication of those two numbers (number1 and 2)     cout << "How much is  " << number1 << " times " << number2 << " ?" << endl;//print how much is number 1 multiplied by number 2 ? } int main() {// the main function      int studentResponse = 1;// declaring local variable called student response      questionGenerator();// calling the question generator function      while (studentResponse != -1) {// as long as the student response not equal to -1 then:         cout << "Enter the correct answer" << endl;// print enter the correct answer statement          cin >> studentResponse;// allow user to input the student response variables value          if (answer == studentResponse) {//if the studenrt response entered by user equal the answer variable of multiplying those two numbers1 and number2 variables              cout << "Very Good!" << endl;// then print very good statement              questionGenerator();// then recall the function again for the net set of random numebrs multiplication              continue;// continue till user enter incorrect answer         }         else {// otherwise when answer not correct then print please try again statement              cout << "Please try again!" << endl;             while (studentResponse != answer) {// while loop if student response not equal to the correct answer then:                 cout << "Enter the correct answer" << endl;//print message enter correct answer                 cin >> studentResponse;//allow user to reneter hoping to get the correct answer, this will keep repeats as long as the student answer and the corredct answer doesnt match                 if (answer == studentResponse) {// if the answer match with student answer then:                     cout << "Very Good!" << endl;// then print very good statement                      questionGenerator();// then recall the function again for the net set of random numebrs multiplication question                      continue;// continue till user input incorrect answer                                                   }             }         }              }     return 0; } ------------------------------ END OF CODE